Synology DS420+ Diskstation Installation Guide

: June 6, 2024
: Synology

Table of Contents

Synology DS420+ Diskstation Installation Guide
Before You Start
Package Contents
Hardware Specification
Optional Accessories
Safety Instructions
Hardware Setup
- Add a Memory Module to Synology NAS
System Maintenance
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Synology DS420+ Diskstation Installation Guide

Synology DS420+
Diskstation pro

Before You Start

Thank you for purchasing this Synology product! Before setting up your new Synology NAS, please check the package contents to verify that you have received the items below. Also, make sure to read the safety instructions carefully to avoid harming yourself or damaging your Synology NAS.
Note: All images below are for illustrative purposes only, and may differ from the actual product.

Package Contents

Synology DS420+ Diskstation FIG 1

Synology DS420+ at a Glance

No.	Article Name	Location	Description
1	Status Indicator	****

Front

| Displays the status of the system. For more information, see “LED Indicator Table.”
2| Drive Status Indicator| Displays the status of each drive. For more information, see “LED Indicator Table.”
3| Drive Tray Lock| Lock or unlock drive trays.
4| USB 3.0 Port| Connect external drives or other USB devices to the Synology NAS here.

5

| ****

Power Button

| 1. Press to power on your Synology NAS.

2. To power off your Synology NAS, press and hold until you hear a beep

sound and the Power LED starts blinking.

6| Drive Tray| Install drives (hard disk drives or solid state drives) here.
7| LAN Port| ****

Rear

| Connect network cable here.

8

| ****

RESET Button

| 1. Press and hold until you hear a beep sound to restore the IP address, DNS server, and password for the admin account to default.

2. Press and hold until you hear a beep, then press and hold again until you hear three beeps to return the Synology NAS to “Not Installed” status so that DiskStation Manager (DSM) can be reinstalled.

LED Indicator Table

LED Indicator	Color	Status	Description

STATUS

| Green| Static| Volume normal

Orange

| ****

Blinking

| Volume degraded/Volume crashed
Volume not created
DSM not installed
Off| HDD hibernation

Disk 1-4

| ****

Green

Power

| ****

Blue

| Static| Powered on
Blinking| Booting up/Shutting down
Off| Powered off

Rear LAN

(on upper side of jack)

| ****

Green

| Static| Network connected
Blinking| Network active
Off| No network

Rear LAN

(on lower side of jack)

Hardware Specification

Item	DS420+

Compatible Drive Type

| • 3.5″/2.5″ SATA x 4

• M.2 2280 NVMe SSD x 2

Supported Client

| • Windows 7 and 10

• Mac OS X 10.11 onward

File System

| • Internal: Btrfs, ext4

• External: Btrfs, ext4, ext3, FAT, NTFS, HFS+, exFAT1

Supported RAID Type

| • Basic • JBOD • RAID 0 • RAID 1

• RAID 5 • RAID 6 • RAID 10

• Synology Hybrid RAID (2-Disk Fault Tolerance)

Agency Certification

| • FCC Class B • CE Class B • BSMI Class B

• EAC • VCCI • CCC • RCM • RoHS Compliant

HDD Hibernation| Yes
Scheduled Power On/Off| Yes
Wake on LAN| Yes

Language Localization

| ****

Environment Requirement

| • Line voltage: 100 V to 240 V AC

• Frequency: 50/60 Hz

• Operating Temperature: 32 to 104˚F (0 to 40˚C)

• Storage Temperature: -5 to 140˚F (-20 to 60˚C)

• Relative Humidity: 5% to 95% RH

Optional Accessories

With Synology accessories, you can customize your Synology NAS to fit different business environments without worrying about compatibility and stability. Visit www.synology.com/compatibility for more information.

Memory Module

Spare Part
Visit www.synology.com/products/spare_parts if you need to replace system fans, disk trays, or power supply units.

Model Name	Picture	Description

Disk Tray (Type D9)

| |

3.5″/2.5″ HDD Tray With Lock

Fan 929225_1

| |

System Fan 929225 mm

Adapter 90W_1

| |

Adapter 90W Level VI

Safety Instructions

Synology DS420+ Diskstation FIG
5

Hardware Setup

Tools and Parts for Component Installation
Please prepare the following tools and parts before setting up your Synology NAS:

A screwdriver (only for 2.5″ drives)
At least one 3.5″ or 2.5″ SATA drive (please visit www.synology.com/compatibility for compatible drive models)
Warning: If you install a drive that contains data, the system will format the drive and erase all existing data. Please back up any important data before installation.

Install Drives

To remove the drive tray, pull on the circled area in the indicated direction as shown in the image below.
Load drives in the drive trays.
For 3.5″ drives: Remove the fastening panels from the sides of the drive tray. Place the drive in the drive tray. Then insert the fastening panels to secure the drive in place.
For 2.5″ drives: Remove the fastening panels from the sides of the drive tray and store them in a safe place. Place the drive in the area of the drive tray indicated by a blue rectangle below. Turn the tray upside down and tighten the screws to secure the drive in place.
Insert the loaded drive tray into the empty drive bay and push it back until you hear a click when the tray is locked into place.
Repeat the steps above to install the other drives you have prepared.
Drives are numbered as shown below.
Note: If you plan to create a RAID volume, we recommend installing drives of identical size to make the best use of drive capacity.

Start Up Your Synology NAS

Use the LAN cable to connect the Synology NAS to your switch, router, or hub.
Connect one end of the AC power adapter to the power port of your Synology NAS. Connect one end of the AC power cord to the AC power adapter, and the other to the power outlet.
Press the power button to turn on your Synology NAS.
Congratulations! Your Synology NAS is now online and detectable from a network computer.

Add a Memory Module to Synology NAS

Optional Synology memory modules are designed to expand the memory of your Synology NAS. Follow the steps below to install, check, or remove a memory module on your Synology NAS.

To install the memory module

Shut down your Synology NAS. Disconnect all cables from your Synology NAS to prevent possible damage.
Remove the hard drive trays from the drive bays. An empty memory slot is located on the inner right side of your Synology NAS.
Note: When you remove the drive trays, sensitive internal components are exposed. Avoid touching anything other than the memory assembly when removing or adding memory.
Insert the new memory module into the empty slot:
Align the small gap between the gold connectors of the memory module with the notch on the empty slot. Insert the memory module into the slot. Make sure that the module is properly inserted.
Gently push down the memory module until you hear a click.
NOTE: Hold the memory module by its edges and avoid touching the gold connectors. Synology will not provide a full product warranty or technical support if a non-Synology memory module is used for memory upgrade.
Insert the drive trays back into the drive bays.
Reconnect the cables removed in step 1, then press the power button to turn on your Synology NAS.

To make sure your Synology NAS recognizes the new memory capacity

Install DiskStation Manager (DSM). Please see “Install DSM on Synology NAS” for more information.
Sign in to DSM as admin or a user belonging to the administrator’s group.
Go to Control Panel > Info Center and check Total Physical Memory.
If your Synology NAS does not recognize the memory or does not start up successfully, please make sure that the memory module is installed correctly.

To remove the memory module

Follow steps 1 and 2 of the “To install the memory module” section to shut down your Synology NAS, disconnect the cables and remove the drive trays.
Push the levers on both sides of the memory module outward. The memory module will be released from its
Hold the memory module by its edges and remove it from the slot.
Insert the drive trays back into the drive bays.
Reconnect the cables removed in step 1, then press the power button to turn on your Synology NAS.

Add an M.2 NVMe SSD to Synology NAS

You can install up to two M.2 NVMe 2280 SSDs on your Synology NAS to create an SSD cache volume. Follow the steps below for SSD module installation and removal.

To install an M.2 NVMe SSD module

Shut down your Synology NAS. Disconnect all cables from your Synology NAS to prevent possible damage.
The SSD slots are located at the bottom of your Synology NAS.
Remove the two covers protecting the modules. You will see two empty slots that are numbered as shown below.
Note: Hold the SSD module by its edge and avoid touching the gold connectors.
Start from slot 1. Insert your SSD module into the empty slot:

Align the small gap between the gold connectors of the SSD module with the notch in the empty slot. Insert the module into the slot. Make sure that the module is properly inserted.
Push the lever outward as shown below. While holding the lever, push down the SSD module, then release the lever to secure the SSD module. Replace the covers.

If needed, repeat the steps above to install a second SSD module into the second slot.
Reconnect the cables removed in step 1, then press the power button to turn on your Synology NAS.

To remove the M.2 NVMe SSD module

Shut down your Synology NAS. Disconnect all cables from your Synology NAS to prevent possible damage. 2 Push the lever outward. The module will pop up and be released from the slot.
Hold the SSD module and remove it from the slot. Replace the covers.
Reconnect the cables removed in step 1, then press the power button to turn on your Synology NAS.

System Maintenance

Initial Troubleshooting Guide

We have selected several helpful articles on frequently asked questions to help you perform initial troubleshooting on your Synology NAS. To view the articles, please click the links provided below:

General
What can I do to troubleshoot NAS connection problems?
Why does my Synology NAS make unusual noises?
How to reset my Synology NAS
Hard Disk Drive
How to choose a suitable HDD for my Synology NAS/IP SAN
How to diagnose drives’ health status when receiving bad sector warnings?
How to fix drive failure and retrieve the data from your drives
What should I do if my Synology NAS cannot recognize installed drives?
How do I know whether the problem is with my Synology NAS or drive when drive errors occur?
Memory
How can I run a memory test on my Synology NAS?
LED
How do I recognize a hibernating Synology NAS via the LED indicators?
What can I do if the STATUS LED keeps flashing orange?
Why can’t my Synology NAS be powered on and why is the POWER LED indicator blinking constantly?
Fan
What type of fan speed modes are available on my Synology NAS?

Install DSM on Synology NAS
After hardware setup is completed, please install DiskStation Manager (DSM) – Synology’s browser-based operating system – on your DS420+.

Install DSM with Web Assistant

Your DS420+ comes with a built-in tool called Web Assistant that helps you download the latest version of DSM from the Internet and install it on your DS420+. To use Web Assistant, please follow the steps below.

Power on your DS420+.
Open a web browser on a computer connected to the same network as the DS420+.
Enter either of the following into the address bar of your browser:

find.synology.com
synologynas:5000

4 Web Assistants will be launched in your web browser. It will search for and find the Synology NAS within the local network. The status of the DS420+ should be Not Installed. Synology DS420+ Diskstation FIG
18

5 Click Connect to start the setup process and follow the onscreen instructions.

NOTE:

The Synology NAS must be connected to the Internet to install DSM with Web Assistant.
Recommended browsers: Chrome, Firefox.
Both the Synology NAS and the computer must be in the same local network.

6 If you accidentally leave the installation process before it is finished, sign in to DSM as admin (default administrative account name) with the password left blank.

Learn More: Your DS420+ is now ready for action. For more information or online resources about your DS420+, please visit www.synology.com

request.
Section 11. Disclaimer of Warranties.
EXCEPT AS EXPRESSLY SET FORTH ABOVE, THE SOFTWARE IS PROVIDED “AS IS” AND WITH ALL FAULTS. SYNOLOGY AND ITS SUPPLIERS HEREBY DISCLAIM ALL OTHER WARRANTIES, EXPRESS, IMPLIED, OR STATUTORY, ARISING BY LAW OR OTHERWISE, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR USE, TITLE, AND NON-INFRINGEMENT, WITH REGARD TO THE SOFTWARE. WITHOUT LIMITING THE FOREGOING, SYNOLOGY DOES NOT WARRANT THAT THE SOFTWARE WILL BE FREE OF BUGS, ERRORS, VIRUSES, OR OTHER DEFECTS.

Section 12. Disclaimer of Certain Damages.
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SYNOLOGY’S AND ITS SUPPLIERS’ LIABILITY ARISING OUT OF OR RELATING TO THE USE OF OR INABILITY TO USE THE SOFTWARE OR OTHERWISE UNDER OR IN CONNECTION WITH THIS EULA OR THE SOFTWARE IS LIMITED TO THE AMOUNT ACTUALLY PAID BY YOU FOR THE PRODUCT REGARDLESS OF THE NUMBER OF DAMAGES YOU MAY INCUR AND WHETHER BASED ON CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHER THEORY.

The foregoing disclaimer of warranties, disclaimer of certain damages, and limitation of liability will apply to the maximum extent permitted by applicable law. The laws of some states/jurisdictions do not allow the exclusion of implied warranties or the exclusion or limitation of certain damages. To the extent that those laws apply to this EULA, the exclusions and limitations set forth above may not apply to you.

Section 14. Export Restrictions. You acknowledge that the Software is subject to U.S. export restrictions. You agree to comply with all applicable laws and regulations that apply to the Software, including without limitation the U.S. Export Administration Regulations.

Section 15. Termination. Without prejudice to any other rights, Synology may terminate this EULA if you do not abide by the terms and conditions contained herein. In such an event, you must cease use of the Software and destroy all copies of the Software and all of its component parts.

Section 16. Assignment. You may not transfer or assign your rights under this EULA to any third party, except for that pre-installed in the Products. Any such transfer or assignment in violation of the foregoing restriction will be void.

Section 17. Applicable Law. Unless expressly prohibited by local law, this EULA is governed by and construed in accordance with the laws of the country, in accordance with which Synology Inc. was organized without regard to any conflict of law principles to the contrary.

Section 18. Dispute Resolution. Any dispute, controversy, or claim arising out of or relating to this EULA will be resolved exclusively and finally by arbitration conducted by three neutral arbitrators in accordance with the procedures of the Arbitration Law and related enforcement rules of the country in which Synology Inc. was organized. In such cases, the arbitration will be limited solely to the dispute between you and Synology. The arbitration, or any portion of it, will not be consolidated with any other arbitration and will not be conducted on a class-wide or class action basis. The arbitration shall take place in Taipei and the arbitration proceedings shall be conducted in English or, if both parties so agree, in Mandarin Chinese. The arbitration award shall be final and binding on the parties and may be enforced in any court having jurisdiction. You understand that, in the absence of this provision, you would have had a right to litigate any such dispute, controversy, or claim in a court, including the right to litigate claims on a class-wide or class-action basis, and you expressly and knowingly waive those rights and agree to resolve any disputes through binding arbitration in accordance with the provisions of this Section 18. Nothing in this Section shall be deemed to prohibit or restrict Synology from seeking injunctive relief or seeking such other rights and remedies as it may have at law or equity for any actual or threatened breach of any provision of this EULA relating to Synology’s intellectual property rights.

Section 19. Attorneys’ Fees. In any arbitration, mediation, or other legal action or proceeding to enforce rights or remedies under this EULA, the prevailing party will be entitled to recover, in addition to any other relief to which it may be entitled, costs and reasonable attorneys’ fees.
Section 20. Severability. If any provision of this EULA is held by a court of competent jurisdiction to be invalid, illegal, or unenforceable, the remainder of this EULA will remain in full force and effect. Section 21. Entire Agreement. This EULA sets forth the entire agreement of Synology and you with respect to the Software and the subject matter hereof and supersedes all prior and contemporaneous understandings and agreements whether written or oral. No amendment, modification or waiver of any of the provisions of this EULA will be valid unless set forth in a written instrument signed by the party to be bound thereby.

SYNOLOGY, INC.LIMITED PRODUCT WARRANTY
THIS LIMITED WARRANTY (“WARRANTY”) APPLIES TO THE PRODUCTS (AS DEFINED BELOW) OF SYNOLOGY, INC. AND ITS AFFILIATES, INCLUDING SYNOLOGY AMERICA CORP, (COLLECTIVELY, “SYNOLOGY”). YOU ACCEPT AND AGREE TO BE BOUND BY THE TERMS OF THIS WARRANTY BY OPENING THE PACKAGE CONTAINING AND/OR USING THE PRODUCT. PLEASE BE ADVISED THAT THIS LIMITED WARRANTY DOES NOT APPLY TO THE SOFTWARE CONTAINED IN THE PRODUCTS WHICH SHALL BE SUBJECT TO ITS END USER LICENSE AGREEMENT AND THAT SYNOLOGY RESERVES THE RIGHT TO MAKE ADJUSTMENTS AND/OR MODIFICATIONS TO THIS PRODUCT WARRANTY FROM TIME TO TIME WITHOUT PROVIDING PRIOR NOTICE TO YOU. IF YOU DO NOT AGREE TO THE TERMS OF THIS WARRANTY, DO NOT USE THE PRODUCT. INSTEAD, YOU MAY RETURN THE PRODUCT TO THE RESELLER WHERE YOU PURCHASED IT FOR A REFUND IN ACCORDANCE WITH THE RESELLER’S APPLICABLE RETURN POLICY. PLEASE NOTE THAT SYNOLOGY’S WARRANTY SUPPORTS ARE NOT AVAILABLE IN EVERY COUNTRY AND THAT SYNOLOGY MAY REFUSE TO PROVIDE THESE LIMITED WARRANTY SUPPORTS TO YOU IF YOU REQUEST SUCH SUPPORTS NOT AT THE COUNTRY AT WHICH THE PRODUCT WAS ORIGINALLY PURCHASED. THE COUNTRY AT WHICH THE PRODUCT WAS ORIGINALLY PURCHASED SHALL BE DETERMINED BASED ON THE SYNOLOGY’S INTERNAL RECORDS.
Section 1. Products
(a) “Products” refer to New Products or Refurbished Products.(b) “New Product” means the Synology-branded hardware product and Synology-branded accessories contained in the original packaging Customer bought from an authorized Synology distributor or reseller. You may see our “New Product” at https://www.synology.com/products/status.(c) “Refurbished Product” means all Synology products which have been refurbished by Synology’s affiliate or an authorized Synology distributor or reseller, not including those sold as “as is” or with “no warranty” by anyone. (d) Other definition: “Customer” means the original person or entity purchasing the Product from Synology or an authorized Synology distributor or reseller; “Online Store” means an online shop operated by Synology or Synology’s affiliate; “Software” means the Synology proprietary software that accompanies the Product when purchased by Customer, is downloaded by Customer from the Web Site, or is pre-installed on the Product by Synology, and includes any firmware, associated media, images, animations, video, audio, text, and applets incorporated into the software or Product and any updates or upgrades to such software.

Section 2. Warranty Period
“Warranty Period”: The warranty period that commences on the purchase date is shown on the purchase receipt or invoice to be presented by the Customer and ends on the day after the end of the Warranty Period for each New Product. You may see the Warranty Period for each New Product at https://[www.synology.com/products/status](http://www.synology.com/products/status). For the Refurbished Product or repair parts, it’s the remainder of the warranty period of the product they are replacing, or ninety (90) days from the date the product was replaced or repaired, whichever is longer; except for those sold as “as is” or with “no warranty” by any stores. Without presenting such purchase receipt or invoice, the warranty period shall commence on the date of manufacture based on our internal record. (b) “Extended Warranty Period”: For Customer purchasing, EW201/ EW202 optional service for applicable Products specified in Section
the Warranty Period specified in Section 2 (a) of the applicable Product registered with EW201/EW202 optional service will be extended by two years. You may see the applied model at
https://[www.synology.com](http://www.synology.com)/products/Extended_Warranty.
Section 3. Limited Warranty and Remedies
Limited Warranty. Subject to Section 3.2, Synology warrants to the Customer that each Product (a) will be free of material defects in workmanship and (b) under normal use will perform substantially in accordance with Synology’s published specifications for the Product during the Warranty Period. Such limited warranty does not apply to the Software contained in the product or purchased by the Customer which shall be subject to the accompanying end user license agreement provided with the Product. Synology provides no warranty to Refurbished Products sold as “as is” or with “no warranty”. This Limited Warranty is NOT transferable and applies only to the customers who directly purchase products from Synology’s affiliate, the resellers, and the distributor that Synology authorized. The warranty set forth in Section 3 will terminate upon the Customer’s sale or transfer of the Product to a third party.
Exclusions. The foregoing warranties and warranty obligations do not apply to any Product that (a) has been installed or used in a manner not specified or described in the Product or its related documents (b) has been damaged by service (including upgrades and expansions) performed by anyone who is not a representative of Synology or any Synology Authorized Service Provider; (c) has been in any way misused, abused, or damaged; (d) has been used with items not provided by Synology other than the hardware or software for which the Product is designed; or (e) otherwise fails to conform to the Product specifications and such failure is attributable to causes not within or under Synology’s control. (f) has been tie-in any non-Synology branded hardware products or any software, even if packaged or sold with Synology hardware. (g) Customer disassembles the Product except as authorized by Synology;
Customer fails to implement any correction, modification, enhancement, improvement, or other update made available to Customer by Synology; or (i) Customer implements, installs, or uses any correction, modification, enhancement, improvement, or other update made available by any third party. (j) Any compatibility issues occurred when installing hardware products, software, or components not supported by Synology. (k) product damage caused by accident, fire, liquid contact, earthquake, or other external cause. (l) cosmetic damage caused by normal wear and tear or otherwise due to the normal aging of the Product, including but not limited to scratches, dents, and broken plastic on ports unless failure has occurred due to a defect in materials or workmanship; (m) serial number has been removed or defaced from Product, resulting in not able to identify.

FCC Declaration of Conformity
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.